Yarn tensioning and guiding device for weavers&#39; shuttles



www5- Jun@ 9, 1936. r E. SCHERDEL YARN TENSIONING AND GUIDING DEVICE FOR WEAVRS SHUTTLES Filed April 10, 1935 INVENTOR Q M607@ v v TTORNEY Patented June 9, 1936 UNITED STATES PATENT OFFICE YARN TENSIONING AND GUIDING DEVICE FOR WEAVERS SHUTTLES 3 Claims.

This invention relates to improvements in the yarn tensioning devices for shuttles used in weaving, as they are for instance described and shown in my co-pending patent application, Serial No. 675,704, led June 1li, 1933, and it is the principal object of my invention to provide elastic members or elements, preferably made of rubber ensaging the yarn on its bobbin during unwinding to effectively avoid a breaking of the yarn, as it frequently happens with the use of brushes or metal tongues causing the yarn thread to become tangled and to break, stopping and delaying the operation of the weaving machine considerably resulting in loss of time and labor.

Another object of my invention is the provision of a yarn tensioning device and guide for the thread in shuttles of Weaving machines which is simple and inexpensive in its construction, yet durable and highly eiiicient in operation.

A further object of my invention is the provision of a yarn guide preferably made of elastic flexible material as for instance rubber, which is provided with marginal slits or scallops or has the form of a tube, and is preferably placed into the shuttle beneath the yarn on its bobbin.

A still further object of my invention is the provision of a thread or yarn guide for shuttles imparting to the yarn a certain tension and protecting the same against breaking and thus contributing to the smooth operation of the weaving machine.

This and other objects and advantages of my invention will become more fully known as the description thereof proceeds, and will then be more specifically dened in the appended claims.

In the accompanying drawing forming a material part of this disclosure:

Fig. l is a top plan view of a shuttle equipped with a yarn guiding and tensioning device constructed according to my invention.

Fig. 2 is a bottom plan View thereof.

Fig. 3 is a section on line 3-3 of Figure 1.

Figs. Ll, 5, 6, 7 and 8 illustrate various forms of yarn guiding and tensioning elements used according to my invention.

As illustrated in a shuttle Il) of suitable construction, and containing the customary bobbin I i for the yarn or thread I2, an elastic tensioning and guiding element, preferably made of rubber or the like material, designated I3, is attached in suitable manner to the inner side Wall of the shuttle, as indicated at I4 and engages the yarn on the bobbin from below. This element I3, may have various suitable forms, as for instance a curved plate shown in Figure 4, and used in the illustrations Figures l, 2 and 3, or it may be provided with marginal recesses to form spaced, comparatively short tongues I6 as shown in Figure 5. As shown in Figure 6 the element I3 is provided with longer and narrower tongues or strips I'I spaced from one another by spaces I8. In the form of elements illustrated in Figure '7, the teeth or tongues are obliquely disposed to the body I3, as indicated at 20, and the body is preferably curved, as at I, while in the form illustrated in Figure 8, the marginal edge of the element I3 is scalloped, as at 2l, and the curved spaces separating the individual scallops are designated 22.

The use of my improved tensioning and yarn guiding device will be entirely clear from the above description by having simultaneous reference to the drawing, and it will be evident, that the elastic elements will safely and smoothly guide the thread or yarn from the shuttle and will prevent the breaking of the thread as it frequently happens with the customary brushes or metal guides.

These elastic elements will greatly facilitate the unspooling of the yarn and the guiding of the same through the yarn guide block avoiding the use of the customary, laterally arranged guide eyes and other metal ngers or the like causing frequent breaks in the yarn and consequent delays in the operation of the machine and thus losses of time and labor.

It will be understood that I have described and shown the preferred forms of my invention only as examples of the many possible ways to practically construct the same, and that I may make such changes in its general arrangement and in the construction of the minor details, as come within the scope of the appended claims, without departure from the spirit of my invention.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is:

1. A yarn tensioning and guiding device for the thread or yarn on the bobbins in shuttles of weaving machines, comprising a rubber body suitably curved and engaging the underside of the yarn on its bobbin, a plurality of tongues formed at one marginal edge of the body by suitably recessing its material.

2. A yarn tensioning and guiding device for the thread or yarn on the bobbins in shuttles of weaving machines, comprising a body of pliable, elastic material suitably curved to engage beneath the bobbin the yarn thereon, and spaced tongues formed with one of the marginal edges of said body obliquely arranged to said body.

3. In a yarn tensioning and guiding device for the thread or yarn on the bobbins in shuttles of Weaving machines, an elongated elastic rubber strip attached at its upper portion to one of the inner Walls of the shuttle near its top, a plurality of parallel tongues integral With said strip and spaced from one another formed by slitting the lower outwardly curved portion of the strip to a certain distance from its upper margin, the curvature of said lower portion conforming to the outer periphery of the bobbin and its yarn and engaging the same from below to avoid breaking oi the yarn and to prevent it from becoming tangled during the operation of the loom by yieldingly and smoothly engaging the yarn.

EGID SCHERDEL. 

